Improvement in window-blind fasteners



W. H. B. ALLEN. Window-Blind Fastener.

No. 222,435. Patented Dec. 9,1879.

\ ATTORNEYS.

. UNIT D ST TES PATENT OFFICE.

WILLIAM H. B. ALLEN, 0E CAMBRIDGE, MASSACHUSETTS, ASSIGNOR TO- 1 HIMSELFND CHARLES L.- ALLEN, OF SAME PLAcE.

IMPRbVEMENT lN WINDOW-BLIND FASTENERS.

Specification forming part of Letters Patent No. 222,435, dated December9, 1879 application filed May 6, 1879.

To all whom it may concern Be it known that I, WILLIAM H. B. ALLEN, ofCambridge, in the county of Middlesex and State of Massachusetts, haveinvented a new .and Improved VVindow-Blind Fastener, of

which the following is a specification.

My invention consists in a blind or shutter fastener operating to retainthe blind open or closed and fitted for convenient manipulation. I makeuse of a pivoted catch and lever hun g on the stile of the blind,'whicl1looks with the hinge-staple to hold the blind in either position.

The construction and operation will be more particularly explained inconnection with the accompanying drawings, vvherein- Figure 1 is aperspective viewof the fastener applied to a blind in a closed position.2 is a top view, the blind being in section on a horizontal'line. Fig. 3is an inverted plan view with the blind open. Fig.4 is a front view ofthe fastener detached.

Similar letters of reference indicate corresponding parts.

The fastener will usually be applied for 0peration in connection withthe lower hinge of I a blind or shutter.

, Theblind (represented atA) ishungon hingepins that project fromstaples b, of any usual or desired character.

The fastener B is hung at the outside of the handle, f, that passesbetween the slats of the blind to the inside, or, in case the blind isnot slatted, through an aperture made especially for it. The fastener isto be operated by this handlef, as hereinafter described.

The extension 6, when in the position shown in Fig. 1, lies closelyagainst the side of staple b, thereby serving to prevent the blindturning on its hinges until, by movement of lever d, the extension eisraised high enough to pass over the staple as the blind swings open,which movement may be effected by pressure on handle A the under side,and in the outer portion of the extension 0, is a slot or mortise, i,(see Figs. 3 and 4,) which, when the blind is fully opened, drops overthe staple b to retain the blind in position, as shown by Fig. 3. Thefastener is weighted to fall to its locked posi tion.

The fastener will preferably be made of malleable iron, lacquered orgalvanized.

The above-describedconstruction furnishes a blind and shutter fasteningof simple and durable construction, which can readily be applied, andmay be operated conveniently. No mortising or other cutting of the blindis required, and the fastener is specially adapted for application toblind-ban gin gs of usual character.

Having thus described my invention, I claim as new and desire to Secureby Letters Patent- As an improved blind-fastening, the device B,consisting of a lever, d, having the extension' 6, mortised at t, thesocket-plate c, and handle f, combined for operation in connection witha hinge, substantially as shown and described.

WILLIAM HENRY BURBECK ALLEN.

Witnesses:

ALFRED WILLLAMS, GILES H. R1011.

